Oxidation numbers and electron process?

2017-11-08 1:12 pm
The balanced half-reaction in which dichromate ion is reduced to chromium(III) ion is a ______process
Select one:
a. four-electron
b. twelve-electron
c. three-electron
d. six-electron
e. two-electron

回答 (1)

2017-11-08 3:01 pm
The balanced half-reaction in which dichromate ion is reduced to chromium(III) ion is :
Cr₂O₇²⁻(aq) + 14H⁺(aq) + 6e⁻ → 2Cr³⁺(aq) + 7H₂O(l)
Six electrons are involved.

The answer: d. six-electron


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